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This commit is contained in:
Andreas Mueller
2011-09-26 17:21:03 +02:00
parent 3b713d67bb
commit 78f16f4264
1 changed files with 11 additions and 11 deletions
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scikits/image/filter/tests/test_canny.py
+11 -11
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@@ -11,21 +11,21 @@ class TestCanny(unittest.TestCase):
def test_00_01_zeros_mask(self):
'''Test that the Canny filter finds no points in a masked image'''
result = (F.canny(np.random.uniform(size=(20,20)), 4,0,0,
np.zeros((20,20),bool)))
result = (F.canny(np.random.uniform(size=(20,20)), 4, 0, 0,
np.zeros((20, 20), bool)))
self.assertFalse(np.any(result))
def test_01_01_circle(self):
'''Test that the Canny filter finds the outlines of a circle'''
i,j = np.mgrid[-200:200,-200:200].astype(float) / 200
c = np.abs(np.sqrt(i*i+j*j) - .5) < .02
result = F.canny(c.astype(float), 4, 0, 0,np.ones(c.shape,bool))
i, j = np.mgrid[-200:200, -200:200].astype(float) / 200
c = np.abs(np.sqrt( i * i + j * j) - .5) < .02
result = F.canny(c.astype(float), 4, 0, 0, np.ones(c.shape, bool))
#
# erode and dilate the circle to get rings that should contain the
# outlines
#
cd = binary_dilation(c, iterations=3)
ce = binary_erosion(c,iterations=3)
ce = binary_erosion(c, iterations=3)
cde = np.logical_and(cd, np.logical_not(ce))
self.assertTrue(np.all(cde[result]))
#
@@ -41,16 +41,16 @@ class TestCanny(unittest.TestCase):
def test_01_02_circle_with_noise(self):
'''Test that the Canny filter finds the circle outlines in a noisy image'''
np.random.seed(0)
i,j = np.mgrid[-200:200,-200:200].astype(float) / 200
c = np.abs(np.sqrt(i*i+j*j) - .5) < .02
cf = c.astype(float) * .5 + np.random.uniform(size=c.shape)*.5
result = F.canny(cf, 4, .1, .2,np.ones(c.shape,bool))
i,j = np.mgrid[-200:200, -200:200].astype(float) / 200
c = np.abs(np.sqrt( i * i + j * j) - .5) < .02
cf = c.astype(float) * .5 + np.random.uniform(size=c.shape) * .5
result = F.canny(cf, 4, .1, .2, np.ones(c.shape, bool))
#
# erode and dilate the circle to get rings that should contain the
# outlines
#
cd = binary_dilation(c, iterations=4)
ce = binary_erosion(c,iterations=4)
ce = binary_erosion(c, iterations=4)
cde = np.logical_and(cd, np.logical_not(ce))
self.assertTrue(np.all(cde[result]))
point_count = np.sum(result)